Perhaps you should try some spelling variations:
"literatura breve de isaac." » "literatura en de isaac.", "literatura del de isaac.", "literatura e de isaac."
"literatura de del islam." » "literatura de el islam."
"literatura _ de islam." » "literatura _ de isla.", "literatura _ e islam.", "literatura _ de ilam."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("literatura _ de islam.") or ("literatura de del islam."))) or ("literatura breve de isaac."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("literatura _ de islam.") OR ("literatura de del islam."))) OR ("literatura breve de isaac."))*.
• Removing quotes may allow a broader search: (((( literatura _ de islam. ) or ( literatura de del islam. ))) or ( literatura breve de isaac. ))*.